Plot Analysis Summary
A guilt-ridden protagonist moves from protective violence and concealment toward confession, surrender, and suicide.
Story Structure — 4 Plot Phases
A House Under Strain
The estranged stepfather returns and creates tension inside the household. The protagonist feels unable to protect the younger girl through legal means.
Key Events
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Estranged Stepfather Returns — The estranged stepfather returns and begins freeloading from the family.
Location: Family home
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Suspicious Nighttime Encounter — The protagonist believes he sees the stepfather making sexual advances toward his stepsister.
Location: Family home
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Legal Barrier Discovered — The protagonist learns that removing the stepfather legally is impossible under the family circumstances.
Location: Family home
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Waiting For Legal Change — His mother asks him to endure the situation until the younger girl reaches fifteen.
Location: Family home
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Electrocution Research — The protagonist researches and experiments with electrocution before carrying out his plan.
Location: The protagonist's study area
The Hidden Electrocution
The protagonist researches electrocution and kills his stepfather. An apparently natural-death ruling and a carefully supported school alibi conceal the act.
Key Events
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Stepfather Dies — The protagonist electrocutes and kills his stepfather.
Location: Family home
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Natural Death Ruling — Police declare that the death resulted from natural causes.
Location: Family home
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Painting Alibi Confirmed — Classmates support the protagonist's alibi involving a painting completed during school.
Location: School classroom
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Cancer Revelation — The younger girl reveals that the dead stepfather had been dying of cancer.
Location: Family home
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Routine Continues — The protagonist continues everyday life while carrying guilt over the killing.
Location: Family home and school
Blackmail At Work
The protagonist begins seeing Noriko, but a classmate discovers evidence of the earlier killing and demands money. A staged robbery ends in another death.
Key Events
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Noriko Relationship Begins — The protagonist begins seeing his classmate Noriko Fukuhara. Characters: Noriko Fukuhara
Location: School
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Blackmail At Convenience Store — A troublesome classmate recognizes the crime and demands three hundred thousand yen.
Location: Convenience store
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Robbery Is Staged — The protagonist tricks the blackmailer into staging a robbery at the workplace.
Location: Convenience store
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Second Killing — The protagonist stabs the blackmailer and makes the attack appear self-defensive.
Location: Convenience store
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Kano Questions The Story — Masashi Kano identifies flaws in the protagonist's account of both deaths. Characters: Masashi Kano
Location: Police investigation area
Confession And Final Choice
Kano detects inconsistencies and the police uncover the truth. Noriko offers continued protection, but the protagonist records a message and ends his life.
Key Events
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Confession At Station — While seeing Noriko home, the protagonist admits that he is a murderer. Characters: Noriko Fukuhara
Location: Train station
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Truth Is Uncovered — Police uncover what really happened in both killings. Characters: Masashi Kano
Location: Police investigation area
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Conditional Release — Kano lets the protagonist go home after he promises to surrender the next day. Characters: Masashi Kano
Location: Police investigation area
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Noriko Promises Silence — Noriko confirms that she lied for him and will continue lying for him in court. Characters: Noriko Fukuhara
Location: School
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Bicycle Meets Bus — The protagonist rides his bicycle into the direct path of a bus and dies.
Location: Road
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Tape And Blue Drawing — Noriko listens to the protagonist's favorite-things recording while stopping her blue drawing. Characters: Noriko Fukuhara
Location: School